Gear production process facilitating gear surface quality

Abstract

The invention discloses a gear production process facilitating gear surface quality. The gear production process comprises the bar blanking, the cutting, the heat treatment, the fine cutting and the grinding performed in sequence; the material of a bar is 20CrMnTiH; the heat treatment comprises the following steps: when a blank obtained by the cutting is heated to 830-920 DEG C, the carburizing treatment is performed; and in the carburizing treatment, the temperature keeping time is not lower than 3 h; the slow cooling is performed after the carburizing treatment; when the blank is slowly cooled not higher than 550 DEG C, the secondary heating is performed, and the insulation is performed not lower than 2 h; then, the quenching is performed; the quenched blank is heated for the third time to 170-200 DEG C; the insulation is performed not lower than 3 h; then, the tempering is performed; the blank is heated to 840-870 DEG C in the secondary heating; and the carburizing treatment comprises the preheating phase, the strong carburizing phase and the dispersing phase performed in sequence. The process is simple in steps, and is convenient to obtain a gear with differently released surface hardened layer and proper impact resistance, wear resistance and strength.

Description

technical field [0001] The invention relates to a transmission component manufacturing process for torque transmission, in particular to a gear production process that is beneficial to the surface quality of the gear. Background technique [0002] Gears are key components in mechanical equipment, and the quality of gears is directly related to the service life of the entire equipment. The quality of the gear depends largely on the gear material and its heat treatment process. Therefore, manufacturers related to gear manufacturing both at home and abroad attach great importance to the research and development of gear materials and heat treatment technology. [0003] The material selection of gears in the prior art is generally based on the force and working environment of the gear in the transmission system. The heat treatment process is a means to ensure that the thickness of the gear surface hardening layer, the hardness of the gear surface and core, and the corrosion resi...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned prior art, the product obtained by heat treatment for gears made of 20CrMnTiH has a high martensitic metallographic grade, and the gears obtained in this way are prone to work hardening under the action of external force during use, resulting in the gears being damaged in a relatively short period of time. Detachment of the surface layer occurs, which seriously affects the stability and service life of the gear transmission. The invention provides a gear production process that is beneficial to the surface quality of the gear